Vettel pulled no punches when asked for his opinion in the paddock at the Sepang International Circuit ahead of this weekend's Malaysian Grand Prix.

The 26-year-old gained first-hand experience of the noise from the Red Bull pit wall during the season-opening race in Australia recently following his early retirement.

Vettel was damning in his assessment of F1's new sound

The piercing scream of the old 2.4-litre V8 engines has been replaced by the more textural sound of the new 1.6-litre V6 turbo-charged power units, and it has caused a considerable furore.

When asked for his thoughts on the matter, Vettel said: "It's s***. I was on the pit wall during the race - it's better than in the bar!

Vettel in Malaysia

Vettel in Malaysia

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"That's my opinion and I think for the fans as well.

"Formula One has to be spectacular and the sound is one of the most important things. When I was a small child, I don't remember much, but I remember when I was six years old and we went to see the cars live during free practice.

"The one thing I remember was the sound, how loud they were, to feel the cars through the ground and the whole ground was vibrating.